/*

 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import java.io.File;

import java.io.IOException;

import java.io.RandomAccessFile;

import java.util.Objects;

import sun.management.jdp.JdpJmxPacket;

import sun.management.jdp.JdpException;

public class JdpDoSomething {

    private static final String lockFileName = "JdpDoSomething.lck";

    private static final boolean verbose=false;

    public static boolean getVerbose(){

        return verbose;

    }

    public static void printJdpPacket(JdpJmxPacket p) {

        if (getVerbose()) {

            try {

                RandomAccessFile f = new RandomAccessFile("out.dmp", "rw");

                f.write(p.getPacketData());

                f.close();

            } catch (IOException e) {

                System.out.println("Can't write a dump file: " + e);

            }

            System.out.println("Id: " + p.getId());

            System.out.println("Jmx: " + p.getJmxServiceUrl());

            System.out.println("Main: " + p.getMainClass());

            System.out.println("InstanceName: " + p.getInstanceName());

            System.out.flush();

        }

    }

    public static void compaireJdpPacketEx(JdpJmxPacket p1, JdpJmxPacket p2)

    throws JdpException {

        if (!Objects.equals(p1, p1)) {

            throw new JdpException("Packet mismatch error");

        }

        if (!Objects.equals(p1.getMainClass(), p2.getMainClass())) {

            throw new JdpException("Packet mismatch error (main class)");

        }

        if (!Objects.equals(p1.getInstanceName(), p2.getInstanceName())) {

            throw new JdpException("Packet mismatch error (instance name)");

        }

    }

    public static void doSomething() {

        try {

            File lockFile = new File(lockFileName);

            lockFile.createNewFile();

            while (lockFile.exists()) {

                long datetime = lockFile.lastModified();

                long epoch = System.currentTimeMillis() / 1000;

                // Don't allow test app to run more than an hour

                if (epoch - datetime > 3600) {

                    System.err.println("Lock is too old. Aborting");

                    return;

                }

                Thread.sleep(1);

            }

        } catch (Throwable e) {

            System.err.println("Something bad happens:" + e);

        }

    }

    public static void main(String args[]) throws Exception {

        System.err.println("main enter");

        doSomething();

        System.err.println("main exit");

    }

}